In the sterile laboratories of Kamino, the ailing clone trooper Tup and his friend ARC Trooper Fives are quarantined for examination following Tup's shocking murder of a Jedi Master.
A Jedi mission finds a lightsaber belonging to the long-dead Master Sifo-Dyas, prompting Yoda, Obi-Wan Kenobi, and Anakin Skywalker to begin an investigation into his decade-old disappearance.
Letting the Force guide him, Yoda voyages into the heart of the galaxy to an ancient world that is one of the wellsprings of the Force and the source of midi-chlorians.
After many grueling trials, Yoda next travels to the ancient Sith home world of Moraband, where he must face an ancient evil determined to rule the galaxy.